The rar doesn't contain the dir jad2-21 so I'm pretty sure that's OK.
In that case, you need to remove the directory from the hash values. All file paths are relative to what you specified under FOLDER.
Right - Dropbox should be OK since such a tiny file should never get anywhere near their download limits...
No, DropBox is not okay, because if you go to that link, you get a webpage.
As I said before, the file needs to be directly readable from that link. No webpage, no download, just straight up TXT. Most likely Axem will need to put it on his own webspace.